Please let me know if posted in wrong place. Street Pilot 2720 will not load maps after doing a map update (NT 2015.20). Cycling between loading maps (dimmer screen) and power up (bright screen). Was working fine before update. Unit did shut down during update at 6 minutes before it ended. Now neither Mapsource or Garmin's site ''sees'' the unit. I know this update is compatible since I have another 2720 (withh the ill fated lifetime updates) working perfectly. I did do a powerup_find and did erase all user data.